text: // skip this test for now
  // throws introspection error
  let n = global.__abstract ? global.__abstract("number", "4") : 4;
  
  function fibonacci(x) {
    return x <= 1 ? x : fibonacci(x - 1) + fibonacci(x - 2);
  }
  
  let x = fibonacci(n);
  let y = typeof x;
  
  inspect = function() { return x + " " + y; }
  